<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript">
        //火狐浏览器支持该种方式获取事件对象
        var event01=window.event;
        console.log(event01);

    </script>

</head>
<body>

</body>
</html>